Lubricator



J. PROCHASKA LUBRICATOR Oct. 26, 1926.

Filed Feb. 24, 1925 l HHl z y m m Q 0 w Patented Get. 26, 1926..

STATES JERRY PBOCHASKA, F .RENFROW, OKLAHOMA.

LUBBICATOR.

Application filed February 24;, 1925. .Serial No. 11,309..

My invention rel-ates to improvements in lubricators and moreparticularly to a forcefeed grease cup.

It is an object of the invention to provide a grease cup having meansfor forcing the grease from the cup upon rotation of the cup in eitherdirection.

A further object of the invention'is to pr vide a grease cup in which apiston is threadedly mounted having a stem with separate passagesleading from the top and underside of the piston, whereby the greasewill be dischargedthrough the stem upon rotation of the cup in eitherdirection.

Another object of the invention is to provide a device of the abovecharacter which is simple and durable in construction, reliable andetficient in operation and inexpensive to manufacture.

Other objects and advantages of the invention will be apparent duringthe course of the following description.

In the accompanying drawing, forming a part of this specification and inwhich like numerals are employed to designate like parts throughout thesame,

Fig. 1, is a side elevation of my improved grease cup,

Fig. 2, is a longitudinal sectional view of the same, and,

Fig. 3, is a cross sectional view on lines 33 of Fig. 2.

In the drawing, wherein for the purpose of illustration I have shown apreferred embodiment of my invention, the numeral. 5, denotes a circularcontainer or cup closed at its upper end. The inside wall of the cup isprovided with screw-threads 6 for the entire length thereof. A piston 7is mounted within the cup, its peripheral edge having screwthreads 8 toengage the screwthreads 6 of the cup, whereby rotation of the cup willmove the piston up and down within the cup. the piston 7 is providedwith a stem 9 having screw-threads 10 at its lower end for connecting itwith the parts of the machinery to be greased. The bottom of the cup isclosed by the disc 11 which is fastened in place by the screws 12. Thedisc is provided with a central aperture 13 through which the stem 9extends and is surrounded by an annular screw-threaded recess 1% inwhich the felt washer 15, or other suitable packing is placed, beingheld in place by the packing nut 16 which threadedly engages the recess.After adjustment the packing nut may be locked in place by the setscrews 17. The stem 9 has two parallel passages 18 and 19 extendinglongitudinally thereof, the passage 18 extending through the piston andopening on the upper side thereof, while the passage 19 terminates belowthe piston, as at 20, opening beneath the piston. Thus, itis seen thatcommunication is established between the cup and stem on both sides ofthe piston, the purpose of which will be set forth hereinafter.

Cast integral with the side of the cup, about midway its length, is afilling spout 21 and communication between the spout and cup isestablished by the passage 22 through the side of the cup. The open endof the spout is normally closed by the valve 22 which is held closed bythe coil spring 23 mounted beneath the same. The respective ends of thespring 23 are connected with the valve 22 and the bottom of the spout,by solder or other suitable means, the spring having suiiicient tensionto limit the upward movement of the valve. Pressure on the valve willcompress the spring and permit grease to be introduced into the cupthrough the medium of a grease gun or other suitable filling means.

In use, it will be seen that when the piston is in the position as shownin Fig. 2, the portion of the cup below the piston can be filled withgrease and rotation of the cup in an upward direction will cause thepiston to force the grease through the passage 19 of the stem to theparts of the machine to be lubricated. Then all of the grease within thecup has been discharged, the piston will then be in a position below thepassage 22 and the portion of the cup above the piston may then befilled with grease and reverse rotation of the cup will cause the greaseto be forced through the passage 18 of the stem. Thus, it is seen thatgrease will be forcibly discharged from the cup upon rotation of the cupin either direction.

It is'to be understood that the form of my invention herewith shown anddescribed is to be taken as a preferred example of the same and thatcertain changes in the shape, size and arrangement of the parts may bemade without departing from the sairit of the invention or the scope ofthe su joined claims.

Having thus described my invention, I claim 7 1. A device of thecharacter described ineluding a cup, a reversibly operable piston withinsaid cup having screw-threaded eonneotion therewith, and a stemdepending from said piston having longitudinal passages leading from thetop and underside of said piston.

2. A device of the character described including a circular cup havingits inner Wall provided with screw-threads and closed at its upper end,a reversibly operable piston Within said cup having its peripheral edgein threaded engagement With the screw-threads of the cup, a removableplate closing the lower end of said cup having a central aperture, astem depending from said piston and extending through the aperture ofthe plate, said stem having longitudinal passages leading from the upperand underside of said piston, whereby grease Will be dis charged fromthe cup upon rotation of the same in either direotion, and a fillingspout having communication with the cup.

In testimony whereof I aliix my signature.

JERRY PROCHASKA.

